Looking through the api docs it would seem that pretty much everything is there except something I wanted to investigate if it would be possible to do. Which is to query the stackoverflow taxonomy ( or more exsact, folksonomy ) of languages. Looking over the tags page and also the tagging enter field on question posting it would seem like its pretty nicely done at the moment on the both, the front page with just a 'filter' param sent to tags-for-index the question post with a callback on tags

I don't quite follow this request, could you give some examples of what you expect to provide as a query and what you'd like returned?
–
Kevin Montrose♦Nov 19 '10 at 17:20

Sorry Kevin, The request would be to expose the same functionality that is on the tags page to the api ( The ability to query all tags with a param such as a partial string and return back a dataset of tags that match ) which is currently how your able to refine your search on the tags page. Cheers
–
user4124Nov 20 '10 at 19:00